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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef FREQUENCYMONITOR_H
#define FREQUENCYMONITOR_H
#include <QObject>
#include <QTimer>
class FrequencyMonitorPrivate;
/**
* Class for measuring frequency of events
*
* Occurrence of the event is notified by the client via the notify() slot.
* On a regular interval, both an instantaneous and a rolling average
* event frequency are calculated.
*/
class FrequencyMonitor : public QObject
{
Q_OBJECT
Q_DECLARE_PRIVATE(FrequencyMonitor)
Q_PROPERTY(QString label READ label WRITE setLabel NOTIFY labelChanged)
Q_PROPERTY(bool active READ active WRITE setActive NOTIFY activeChanged)
Q_PROPERTY(int samplingInterval READ samplingInterval WRITE setSamplingInterval NOTIFY samplingIntervalChanged)
Q_PROPERTY(int traceInterval READ traceInterval WRITE setTraceInterval NOTIFY traceIntervalChanged)
Q_PROPERTY(qreal instantaneousFrequency READ instantaneousFrequency NOTIFY instantaneousFrequencyChanged)
Q_PROPERTY(qreal averageFrequency READ averageFrequency NOTIFY averageFrequencyChanged)
public:
FrequencyMonitor(QObject *parent = 0);
~FrequencyMonitor();
static void qmlRegisterType();
QString label() const;
bool active() const;
int samplingInterval() const;
int traceInterval() const;
qreal instantaneousFrequency() const;
qreal averageFrequency() const;
signals:
void labelChanged(const QString &value);
void activeChanged(bool);
void samplingIntervalChanged(int value);
void traceIntervalChanged(int value);
void frequencyChanged();
void instantaneousFrequencyChanged(qreal value);
void averageFrequencyChanged(qreal value);
public slots:
Q_INVOKABLE void notify();
Q_INVOKABLE void trace();
void setActive(bool value);
void setLabel(const QString &value);
void setSamplingInterval(int value);
void setTraceInterval(int value);
private:
FrequencyMonitorPrivate *d_ptr;
};
#endif // FREQUENCYMONITOR_H
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